Digibus+S.S. volume adjustment module

4-position switching module for Digibus and Sound System installations with Petrarca interphones. The module is used for setting the call volume to one of three levels and disabling the acoustic call signal. The latter status is indicated by means of a red LED. To be fitted in the appropriate seat after removing the blank module. A green LED indicates that the door is open when connected to a suitable lock or door. Used with interphone 6204, it allows activation of the User Away function